A digital image watermarking system: modeling, performance analysis, and application

In this paper, we interpret the watermarking problem as a digital communication problem. There are three main criteria concerning the performance of a watermarking technique: capacity, im-perceptibility, and robustness. We then show the tradeoffs between these three criteria adopting concepts from the digital communication theory. After the analysis has been established, two wa-termarking schemes adaptive to human visual system (HVS) are proposed. In addition, error cor-rection coding and spread spectrum communication techniques are used to lower the watermark de-tection error. After the analysis on watermarking systems and proposition of new watermarking techniques have been performed, a digital internet image library (IIL) in the WWW is presented as a watermark application for copyright protection in the internet. Keyword?communication theory, human visual system, digital watermarking, WWW